Life-of-the-well annular sealing in cementless completion
Challenge
Nowadays, cementing operations are the most common techniques used in the upstream oil and gas business to guarantee a critical hydraulic barrier between the casing and the formation. The goal is to isolate individual zones and prevent annular flow.
As such, annulus cementing is mainly considered one of the essential operations during the well construction.
However, the cement is likely to fail, and may not guarantee the requested downhole zonal isolation during the whole life-of-well.
Solution
Openhole annulus packers operate for numerous oil and gas operators worldwide, to reinforce or definitely replace the cement in critical external casing sections, and provide the critical zonal isolation required downhole.
Saltel Expandable Steel Packers are designed to meet the requirements of the most challenging applications, such as cementless completions. Annular Zonal Isolation Packers (AZIP) provide a life-of-the-well annulus sealing.
| Features/Xpandable Steel Packer | Xpandable steel AZIP-C 1-0 | Xpandable steel AZIP-C 1-1 |
|---|---|---|
| Mounting | Crimped | Crimped |
| Valve system | Lock valve closing permanently packer expansion port. Annulus compensation valve (one side) | Lock valve closing permanently packer expansion port. Dual Annulus compensation valve (both sides) |
| Sealing System | Deformable corrosion-resistant alloy (CRA) sleeve with elastomer seal | Deformable corrosion-resistant alloy (CRA) sleeve with elastomer seal |
| Reliability | Life of well (Sweet and Sour environment) | Life of well (Sweet and Sour environment) |
| Performance | Self energized high-pressure differential from one direction unaffected by temperature variations | Self energized high-pressure differential from one direction unaffected by temperature variations |
| Max DeltaP Compensated | Up to 3,000 psi depending on diameter and sleeve thickness | Up to 3,000 psi depending on diameter and sleeve thickness |
| Max DeltaP Not Compensated | Up to 3,000 psi depending on diameter and sleeve thickness | Up to 3,000 psi depending on diameter and sleeve thickness |
| Max Temp. | 302 degF - 150 degC | 302 degF - 150 degC |
| Qualification | API 19 OH V1 | API 19 OH V1 |